Because of their youth, these politicians have found themselves speaking on behalf of and to a youthful constituency that doesn't vote enough to support them.
Again, Thomson speaks for a constituency that doesn't exist: there was never a gap between popular cinema and the art house, and any movie theatre that showed, in first run, "Vertigo" or "Scarface" or "Citizen Kane" or "Johnny Guitar" or "The King of Comedy" or "Once Upon a Time in America" or "Black Swan" was an art house, even if not advertised as such.
It proceeded, with the systematic method of the deranged, to snub, attack, marginalise and infuriate every constituency that did not correspond to its own: women, Christians, socialists, atheists, Shias.
As it happens, this is also one of the last human constituencies that doesn't have the right to vote.
Tellingly, Mr. Obama and Mrs. Clinton left South Carolina on Saturday night for two states that, like this one, have moderate political constituencies that do not often embrace Democrats in presidential general elections.
It concluded that the GOP needs to change the way its reaches out to constituencies that don't usually vote Republican.
It is, and his fame has not yet turned his constituency home into a visitor attraction, but that does not apply to another great local family, the Cavendishes.
The Port Authority, which operates La Guardia and Kennedy Airports under a lease that does not expire until 2015, does not have much of a constituency.
Following a visceral reaction to his NPRM, it seems that Wheeler has had less interest in trying to thread a needle that has no eye, aiming to pick up a constituency in the middle that doesn't precisely exist.
Those who did mind were often forced to opt for parties that didn't stand a chance in their constituency.
